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Finding the Fourth Proportional to 339,278.44, 508,878.78 and 89,979.88

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Solution

The fourth proportional to 339,278.44, 508,878.78 and 89,979.88 is: 134,959.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,278.44 : 508,878.78 = 89,979.88 : x
  2. Step 2: Convert to fraction form
    339,278.44/508,878.78 = 89,979.88/x
  3. Step 3: Cross multiply
    339,278.44x = 508,878.78 × 89,979.88
  4. Step 4: Simplify right side
    339,278.44x = 45,788,851,558.95
  5. Step 5: Solve for x
    x = 45,788,851,558.95/339,278.44
  6. Step 6: Final answer
    x = 134,959.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.